/Engine/Source/Runtime/MessagingCommon/Public/MessageHandlers.h
Type definition for function objects that are compatible with thisTFunctionMessageHandler.
typedef [TFunction](API\Runtime\Core\GenericPlatform\TFunction)< void(const [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [IMessageContext](API\Runtime\Messaging\IMessageContext), ESPMode::ThreadSafe > &)> FuncType